Examples:
A
■ He had to take a torch.
■ He didn't have to take a radio.
■ He had to take binoculars.
■ He didn't have to take comics.
B
■ Did he have to take a tent?
□ Yes, he did. / No, he didn't.
■ Did he have to take comics?
□ Yes, he did. / No, he didn't.